Car truck bolster



NOV 28, 1933 G. T. JOHNSON Er AL CAR TRUCK BOLSTER Filed April 25, 1950 2 Sheets-Sheet l IID S14/venten) I. e/mswz MH. Wfeffgack www NOV- 28, 1933 G. T. .JOHNSON Er AL 1,936,717

CAR TRUCK BOLSTER Filed April 26, 1930 2 Sheets-Sheet 2 gwue'ntou AND www#

dumm@ Patented Nov. 28, 1933 UNETED STATES PATENT oFFicE.

CAR TRUCK BoLsTEn Application April 26, i930. serial No.'fi47,556 i0 claims. (o1. 10s- 230) The present invention pertains to car truck 1colsters, and more especially to novel means for reinforcing the spring seat ends of cast metal holsters.

Such bolsters are usually of hollow construction, and provided with internal reinforcements which, however, are not particularly adapted to take care of the forces imparted to the spring seats.

The primary purpose of the present invention is to provide improved means for reinforcing the spring seat portions of the bolster, so as to more eiectively distribute the spring load to other parts oi the bolster, and whereby the use of thinner top and bottom portions at the ends oi the bolster may be used without reducing the strength at such ends.

Another object is to employ reinforcing Webs so positioned that they will pass through or close to ases of some of the springs of the spring clusters.

With the foregoing objects outlined and with other objects in View which will appear as the description proceeds, the invention consists in the novel features hereinafter described in detail, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims.

In the drawings,

Fig. 1 is a side elevation of one-half of one form of our improved bolster.

Fig. 2 is a bottom plan view of the same.

Fig. 3 is a vertical sectional view on the line 3 3 of Fig. 2.

Fig. 4 is a similar View on the line 4-4 of Fig. 2.

Fig. 5 is a side elevation of the opposite half of another form of the bolster. Y

Fig. 6 is a bottom plan View of the same.

Fig. 7 is a vertical sectional view of a detail on the line '7-'7 of Fig. 6.

In Figs. 2 and 6, the spring clusters are diagrammatically illustrated.

In the embodiment of the invention shown in Figs. l to 4 inclusive, the bolster is provided at each end with a pair of vertical longitudinally extending parallel webs l and 3, which mergeat their upper and lower ends into the bottom ll and top 13 oi the hollow bolster. This form of reinforcing is conventional, but in accordance with our invention, we extend the outer end portions ci the webs toward the end of the bolster in diverging relation, as shown at 2 and 4, so that these extensions pass through or close to the axes o four oi' the springs 10 of the cluster on which the end of the bolster rests.

We also arrange within the spring seat portion at each end of the bolster, a V-,shaped vertical web 5, whose nose projects inwardly between the diverging extensions 2 and 4, and whose arms 6 and 7 diverge outwardly toward the end of the bolster. The J-shaped web also merges at its upper and lower edges into the top and bottom of the bolster, and it intersects or passes close to theatres of the other three springs 10 of the y cluster.

Thus, the spring seat at each end of the bolster isV reinforced at all centers of spring pressure, and the pressure or load is effectively distributed to the top and bottom portions of the bolster end.

'Ihe bolster is provided at its ends with the usual beading 8 and 9.

In the modiiication shown in'Figs.V 5 to 7 inclusive, the conventional parallel vertical ribs la and 3a are also provided with outwardly diverging extensions 12 and le, which, in this instance, extend entirely to the end of the bolster, and pass through or close to the axes of four of the springs of the group of seven springs, and these extensions also provide reinforcement for the portions of the bolster on which the other three springs of the cluster bear.

Here also the webs la and 3a, as well as their extensions 12 and 14, merge at their upper and lower edges into the bottom 11a, and top 13a of the bolster. v

Obviously, a construction of this character provides reinforcement for the spring seat portions of the bolster, more effective distribution of the spring load to other parts of the bolster, and this construction also permits the use of thinner bottom and top portions at the ends of the bolster, without reducing the strength in those regions.

While we have disclosed what we now consider to be preferred embodiments of the invention in such manner that the same may be readily understood by those skilled in the art, it is manifest that changes may be made in the details disclosed, without departing from the spirit of the invention, as expressed in the claims.

What we claim and desire to secure by Letters Patent is:

l. A bolster having a hollow end portion terminating in a spring seat portion, and vertical webs arranged within the hollow end portion of the bolster and provided with extensions which project into the spring seat portion and reinforces the latter, said webs joining the top and bottom of the bolster substantially throughout their entirety.

2. A hollow bolster having a spring seat portion, and internal reinforcing webs provided in the spring seat portion or" the bolster and positioned in diverging relation, the upper and lower ends of the webs merging into the top and bottom f the bolster, said webs extending longitudinally across said spring seat portion.

3. A bolster having a hollow spring seat portion provided with a substantially at bottom eX- tenoling from side to side of the bolster and designed to rest on a cluster of springs, and outwardly diverging reinforcing webs arranged in the spring seat portion of the bolster and positioned to substantially. intersect a plurality of axes oi springs, the upper and lower ends of the webs merging into the top and bottom of the bolster.

4. A bolster having a hollow spring seat portion provided with internal diverging vertical Webs which merge at their upper and lower edges into the top and bottom of the bolster and eX- tend longitudinally across the spring seat portion.

5. A bolster comprising a hollow end portion including a spring seat portion, substantially parallel vertical webs arranged within the hollow end portion of the bolster and provided With diverging extensions which project into the spring seat portion and reinforce the latter.

6. A bolster having a hollow spring seat portion at each end thereof, vertical reinforcing webs arranged within the hollow spring seat portion and a substantially V-shaped reinforcement positioned between the vertical case.

7. A bolster having a hollow spring seat portion provided internally with diverging reinforcing webs, and a substantially V-shaped web arranged within the spring seat portion of the bolster and having its end positioned between said diverging webs.

8. A bolster having a hollow spring seat portion having a substantially at bottom extending from side to side of the bolster and adapted to rest on a cluster of springs, and outwardly diverging vertical reinforcing webs arranged within the spring seat portion of the bolster and extending across approximate points Where the axes of four of said springs would pass through the spring seat portion of the bolster, the upper and lower ends of the Webs merging into the top and bottom of the bolster.

9. A bolster having a hollow end portion including a spring seat portion, substantially parallel vertical Webs arranged within the hollow end portion and provided with diverging extensions which project into the spring seat portion of the bolster, and a substantially V-shaped reinforcing web arranged Within the spring seat portion and having its point extending between said diverging extensions, all of said webs merging at their upper and lower ends into the top and bottom of the bolster.

l0. A bolster comprising a hollow end portion including a spring seat portion, said spring seat portion having a spring bearing surface in one plane designed to rest on a cluster of springs, reinforcing webs arranged within the hollow end portion of the bolster and provided with extensions which project into the spring seat portion, and` positioned to substantially intersect a plurality of axes of said springs, said webs joining the top and bottom of the bolster substantially throughout their entirety.

GEORGE T. JOHNSON. HARRY w. sTERTzBACH. 

